import type { FetchGasFeeEstimateOptions, GasFeeState } from '@metamask/gas-fee-controller';
import type { Hex } from '@metamask/utils';
import EventEmitter from 'events';
import type { TransactionControllerMessenger } from '../TransactionController.js';
import type { GasFeeEstimates, GasFeeFlow, Layer1GasFeeFlow, TransactionMeta, TransactionBatchMeta } from '../types.js';
import { GasFeeEstimateLevel } from '../types.js';
/**
 * Automatically polls and updates suggested gas fees on unapproved transactions.
 */
export declare class GasFeePoller {
    #private;
    hub: EventEmitter;
    /**
     * Constructs a new instance of the GasFeePoller.
     *
     * @param options - The options for this instance.
     * @param options.gasFeeFlows - The gas fee flows to use to obtain suitable gas fees.
     * @param options.getGasFeeControllerEstimates - Callback to obtain the default fee estimates.
     * @param options.getTransactions - Callback to obtain the transaction data.
     * @param options.getTransactionBatches - Callback to obtain the transaction batch data.
     * @param options.layer1GasFeeFlows - The layer 1 gas fee flows to use to obtain suitable layer 1 gas fees.
     * @param options.messenger - The TransactionControllerMessenger instance.
     * @param options.onStateChange - Callback to register a listener for controller state changes.
     */
    constructor({ gasFeeFlows, getGasFeeControllerEstimates, getTransactions, getTransactionBatches, layer1GasFeeFlows, messenger, onStateChange, }: {
        gasFeeFlows: GasFeeFlow[];
        getGasFeeControllerEstimates: (options: FetchGasFeeEstimateOptions) => Promise<GasFeeState>;
        getTransactions: () => TransactionMeta[];
        getTransactionBatches: () => TransactionBatchMeta[];
        layer1GasFeeFlows: Layer1GasFeeFlow[];
        messenger: TransactionControllerMessenger;
        onStateChange: (listener: () => void) => void;
    });
}
/**
 * Updates gas properties for transaction.
 *
 * @param args - Argument bag.
 * @param args.txMeta - The transaction meta.
 * @param args.gasFeeEstimates - The gas fee estimates.
 * @param args.gasFeeEstimatesLoaded - Whether the gas fee estimates are loaded.
 * @param args.isTxParamsGasFeeUpdatesEnabled - Whether to update the gas fee properties in `txParams`.
 * @param args.layer1GasFee - The layer 1 gas fee.
 */
export declare function updateTransactionGasProperties({ gasFeeEstimates, gasFeeEstimatesLoaded, isTxParamsGasFeeUpdatesEnabled, layer1GasFee, txMeta, }: {
    gasFeeEstimates?: GasFeeEstimates;
    gasFeeEstimatesLoaded?: boolean;
    isTxParamsGasFeeUpdatesEnabled: (transactionMeta: TransactionMeta) => boolean;
    layer1GasFee?: Hex;
    txMeta: TransactionMeta;
}): void;
/**
 * Updates `txParams` gas values accordingly with given `userFeeLevel` from `txMeta.gasFeeEstimates`.
 *
 * @param args - Argument bag.
 * @param args.txMeta - The transaction meta.
 * @param args.userFeeLevel - The user fee level.
 */
export declare function updateTransactionGasEstimates({ txMeta, userFeeLevel, }: {
    txMeta: TransactionMeta;
    userFeeLevel: GasFeeEstimateLevel;
}): void;
//# sourceMappingURL=GasFeePoller.d.ts.map